1 . 根据语境选择方框内恰当的词替换划横线的词

exceptional     boost     crisis     shift     substantial     get involved in     consisting of

1. Without a major improvement in tourism, the economy will suffer even further. ________
2. When you participate in sports and athletes, a lot of the racial barriers are broken down. ________
3. The feet are highly specialised structures made up of 26 small delicate bones. ________
4. This progress has greatly improved the prospects for growth and for a significant reduction in poverty over the next decade. ________
5. At the age of five he showed outstanding talent as a musician. ________
6. This accident caused a dramatic change in public opinion. ________
7. She has always been to the fore at moments of danger. ________